what's the problem?

[Subaharan1202]

File "C:\Users\HP\Desktop\adpost\kijijiapi.py", line 400, in
main()
File "C:\Users\HP\Desktop\adpost\kijijiapi.py", line 337, in main
args.func(args)
File "C:\Users\HP\Desktop\adpost\kijijiapi.py", line 383, in main_post
kijapi.post_ad(args.p)
File "C:\Users\HP\Desktop\adpost\kijijiapi.py", line 221, in post_ad
f = urllib.request.urlopen(url, params)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 222, in urlopen
return opener.open(url, data, timeout)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 531, in open
response = meth(req, response)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 641, in http_response
'http', request, response, code, msg, hdrs)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 569, in error
return self._call_chain(*args)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 503, in _call_chain
result = func(*args)
File "C:\Users\HP\AppData\Local\Programs\Python\Python37\lib\urllib\request.py", line 649, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: